Slip-pump overflow valve



Dec. 6, 1927. 1,651,778

7 J.. RICE SLIP PUMP OVERFLOW VALVE Filed Jan. 28. 1925 I/W/E/V TOR John 1 1 22 6.

Patented Dec. 6, 1927.

UNITED s'r TBS JOHN RICE, or'snrmnvfrnn, 01110." w

' SLIP-PUMP oIvERFtow VALVE.

Application filed January 28 1925. Serial N0. ,S52.

This invention relates to slip pump overflow valves, that is, to'an improved valve; for regulating the pressure within a slip pump while permitting suchpump to overflow for 5 relieving or regulating the pressure. l It is a well known fact that a continual or incessant impact of liquid against a valve- Wall (as against other objects) tends to erode or wear away and weaken such Wall and. eventuallyxthe valve-wall will either burst or-begin toleak, thus not only result- --ing in loss of time and money spent in re newing-the valve, but also probably causing '-much damage to adjacent objects and persons, even to the extent of a loss of human I life where. the valve is used for or in connection with scalding liquid, acids; poison- -ous materialsetc. I

Therefore, one object of the invention is 1:0 provide an overflow valve which is attachable to a slip pump 'or'other container andis provided with simple and very eff-e0 tive means [toprevent the overflowing or discharging liquid from forcefully lmpinging or exerting impact against the wall of the valve-globe. 7

Another object is to provide a valve of this character with an improved form of non-corrodible valve-seat which is removable and replaceable, which is relatively hard and unyielding, and which is provided with moulded embracing and securingmeans' to secure it in place during use.

Another object is to provide a non-corrodible and non-yielding protecting annulus around the valve seat which assists the mouldedembracing and securing means in holding the valve-seat in place and is itself held in its protecting position by said moulded embracing and securing means.

Another object is to. provide a valve of this character 'havinga wide liquid-holding space around the valve-seat, so the liquid in said space acts as a shield to prevent the and eroding the wall of the valve-globe or liquid container;

Another object is to provide a valve ofthe liquid against the wall of the valve-globe.

Another object is to provide a valve of this character with a: removable and'replaceable" pointed out or implied in the following dethe valve-seat- (presently described) for a upper end of a tensioning spring 4t seated other yielding material.

flowing liquid from forcefully impinging on.

greater than the outside diameter of the bushing provided with means for securing 3 the valve-globeto a pump or liquid coiitainer i c Other objects and; important features are tails of description in connectionwith the accompanying drawingsin which: i t if The single, figure of drawings is a centiral vertical sectional view. a g: '7 V In the drawings it is seen that thevalve globe l includes a hollow bossh and an outlet l the latter jbeingga considerable dis= tance above the top of the boss 1 and above purpose or object previouslyexplained The valve-globe isjprovided with/a re-' movable cover 2 which is provided with a tubular central part including' an upwardly pro ecting end 2* and a downwardly projecting end 2 .v I-he. ,part ,2 is internally screw-threaded and has an adjusting screw 3 fitted there n,v while the part? has the therein. The valve-member 5 includes a so guiding shank {Wand a flan ed disc 5", the

latter having its annular angel 6 fitted around a valve-closing disc 6 of rubber or The cover 2 is secured in pla'ceby means of any appropriate number of screws or fasteners? The'fscrew 3 is'formedwith a V tubular lower endor provided with'a guiding aperture 3 in which the guiding shank 5 i'sslidably fitted. Thelower end of the screw 3 providesa seat 'againstwhichjthe' upper end of'the spring 4- is seated, so when this screw is screwed up or d0wn, it"de-j creases or increases thetension or pressure of the spring, 4, thereby determiningxthe pres sure of liquid or fluid necessary for raising the valve-members 5 and 6 from the valveseat 8. This valve-seat is of porcelain or other non-yielding and non-corrodible 'matea v rial, and its lower part is a hollow cylinder, while itsupper'part is frusto-conical.

The frusto-conical part ofthe valve-seat 8 is surroundedby 'anannulus 9 of non-yielding and non-corrodible material such as porcelain and having an internal diameter part of the valve-seat which it surrounds. It is seated on an annular flange 10 which is formed on the upper end ofa tubular mem her or bushing 10f and is-seated on the upper "110 end of the hollow boss 1 The member 10 h its p r ;counter-bored to form a o i shoulder orshelf 1O on Whichthe loWer end of the valve-seat 8 is seated. The Wall 10 of the counter-bore is of greater diameter than the part of the member 8 which it surrounds. Therefore, the space around the greater part of the valve-member 8 provides an annular receptacle for receiving melted securing material such, for instance, as lead, as shown at12. When this securing material has congealed, it unites the parts 8,9 and 10-10 so these united parts can be removed and replaced through the opening which is normally covered by the cover 2. The externally threaded lower end of the member 10 is provided With a securing nut 11, and such threaded end extends below the" securing nut and is" adapted to be screwed into an outlet "of any form of pump or fluid container. 7

I have no intention of limiting my patent protection to the exact construction and arrangeinent of parts here shown, but changes maybe made Within the scope of the inventive ideas as implied and claimed,

What Ivclaim as myinvention is: v 1; A valve-unit including combination, a tubular member having a counter-bore 'tvhioh terminates in anannular shoulder, a

valve=seat of annular form seated on said shoulder and having its outer periphery spaced from the inner periphery of said counter-bore and thereb forming an annw' lar space around the valve-seat, securing valve-seat of annular form seatedon' said 1 shoulder and having its outer periphery spaced from the lnner peripheryof said countei bore and thereby forming an annular space around the valveseat, securing means in said annular space, said tubular member having an annular flange around said counter-bore, an annulus on saidfiiange and spaced from said valve-seat, said annulus and Valve-seat being of relatively noncorrodible material, and an annular securing element of relatively non corrodible 'material filling the space bet-Ween said annulus and said valveseat, said securing element being adapted'to be melted for releasing said Valve-seat and permitting another to be substituted therefor. In testimony whereof I v 7 OHN RICE.

aflix my signature. 

